THE CANADIAN ENTOMOLOGIST. 99 



24. Melanoplus collinus, Scudder. 



Afelaiioplus collinus, Scudd., Proceed. Bost. Soc. Nat. Hist., XIX., 



1878, 284. 



Six males of the above species, which Mr. Scudder states has not 



been heretofore recorded as being found west of New England, were 



taken on Oct. 25, from shady places along the bed of the old Wabash 



and Erie Canal. I was not able to distinguish the females from those of 



femur-rubrufu and atlanis, with which the ones taken were in company. 



The males are readily distinguished from those oi feftiiir-rubrum, which 



Indiana species they most closely resemble, by the following characters : 



The average size is less ; wings shorter, not reaching tip of abdomen ; 



elytra with fewer and smaller spots, and by having the anal cerci forked 



at the tip, 



25. Melanoplus differentialis, Thomas. The Lubberly Grasshopper. 



Acridium differ e7itial is, Thos., Trans. 111. St. Agl. Soc, V., 1865,450. 

 Caloptenus differetitialis, Id., Syn. Acrid. N. A., 1873. 166. 



Id., Ninth Rep. St. Ent., Ill, 1880, 127, 

 fig. 24. 



A very common species along fence rows and borders of cultivated 

 fields, especially in the Wabash river bottoms, where they feed upon the 

 greater ragweed, Ambrosia trifida. On Oct. 2 hundreds were seen along 

 the edge of a field of lowland corn, the leaves of the marginal rows of 

 which they had almost wholly destroyed. When a stalk was approached, 

 they did not desert it, but dodged quickly around to the opposite side, 

 much as a squirrel does around the trunk of a tree when pursued. If, 

 however, one took alarm and jumped, all the others in the immediate 

 vicinity did likewise. The females of this species become exceedingly 

 dark, sometimes almost black, with age, whereas the males are but little 

 changed. 



'O^ 



26, Melanoplus bivittatus. Say. The Yellow-striped Grasshopper. 

 Acridium flavo-vittatum, Harris, Ins. Inj., 1862, 173. 

 Acridium bivittatum, Thos., Trans. 111. St. Agl. Soc, V., 1865, 449. 

 Caloptenus bivittatus. Id., Syn. Acrid. N. A., 1873. 



Id., Ninth Rep. St. Ent., Ill, 1880, 126. 

 Melanoplus femoratus, Scudd., Proceed. Bost. Soc Nat. Hist, XIX., 



1878, 284. 



